package file;

import java.io.File;

/**
 * 新建目录
 * */
public class MkDirDemo {
    public static void main(String[] args) {
        File dir = new File("./demo");
        if (dir.exists()){
            System.out.println("目录已存在");
        }else {
            dir.mkdir();
            System.out.println("创建目录");
        }
    }
}
